The Infectious risk has shown little change over the past 12 weeks, showing no notable shift in recent weeks..
Allergy risk activity has been climbing over the past 12 weeks in Corson, South Dakota.
Pollution risk activity has been climbing over the past 12 weeks in Corson, South Dakota.
Weather risk activity has been trending downward over the past 12 weeks in Corson, South Dakota.
Last updated: August 24, 2026
Data refreshed weekly